Improvement in grinding-mills



UNITED STATES *PATENT QFFICE.

I ADDISON H. NORDYKQE AND DANIEL W. MARMON, OF RICHMOND, INDIANA.

IMPROVEMENT IN` GR`INDINGMILLS.

Specification forming part of Letters PatentNo. 117,668, dated August l,1871.

To all whom it may concern:

Be it known that we, ADDISON H. NoRDvKE and DANIEL W. MARMON, ofRichmond, in the county of Wayne and State of Indiana, have inventedcertain Improvements in Grinding-Mills; and we do hereby declare thatthe following is a full, clear, and exact description thereof, referencebeing had to the annexed drawing making a part of this specification, inwhich- Figure 1 is a vertical central sectioii of our improved mill,showing the frame upon which the mill rests, the stationary stone, th erotating or running stone, the shaft and driving-pulley, and the hopperand spout for conducting the grain to the stones. Fig. 2 is anelevation, partly in section, showing the grooves or channels .formed inthe revolving stone, the means for adjusting the dis tance between thestones, and the arrangement of the feeding-shoe. Figure 3 is a plan viewof a portion of the frame and of the cases which surround the stones,and also of the means for adjusting the stationary stone. Figure 4 is anelevation of the arm and standard which, carries and oscillates thefeeding-shoe. Figure 5 is a plan view of a portion of the feeding-shoe.

Corresponding letters refer to corresponding parts in the several f1gures.

This invention relates to that class of mills which is designed forgrinding grain and other similar substances; and it consists in theconstruction, combination, and arrangement of some of the parts of whichit is composed, as will be more fully explained hereinafter.

In constructing mills of this class a suitable frame, A A, of wood ormetal, is provided, which is to be of sufficient strength and dimensionsto support the parts of the mill; and upon the top of this frame thereis placed a frame, A1, which extends around upon three sides of theupper end of frame A, and may be bolted or otherwise afiixed thereto.This last-named frame may coustitute a portion of the frame A, by beingframed into it or by being bolted to the upper ends of its posts; or itmay consist of a separate frame of metal and be bolted thereto; but inany case it is to be furnished with a cross-bar, between thedriving-pulley and the revolving stone, upon which to cast or otherwisesecure boxes for the journal of the shaft which carries the revolvingstone to run in. Upon the top of frame A there is erected another frame,A2 A2, which is for the purpose of supporting the hopper A3 iu which thegrain to be ground is placed. This hopper is furnished with the usualslide or valve for regulating the discharge of grain or other substancetherefrom 5 and below it is placed a feeding-shoe, A4, which hasimparted to it an oscillating movement-by a device soon to bedescribedand has its outer end supported upon a rope or strap whichpasses over a regulating-pulley, in order th at the feeding of the grainto the stones may be easily regulated. In order that the requisiteoscillatory movement may be given to the feeding-shoe a vertical shaft,B, is passed through the rear end of the shoe, and has formed upon it across-arm or arms, which form journals for boxes placed upon the underside of the shoe to rest upon. The vertical portion of this shaftextends down to and rests in a socket formed upon the frame A, but justabove which point there is an arm which extends to some point upontheshaft which carries the running stone, and upon which there is formed acam-shaped projection, which, as it comes in contact with the arm B',will move it so as to give to the cross-arm upon the upper end of theshaft B an oscillatory movement, which will be imparted to thefeedingshoe. `In order that the grain after it has been delivered to thestones may be properly ground, a horizontal shaft, O, is provided, andplaced in the boxes carried upon the frame A1. Upon the inner end ofthis shaft there is secured a grinding-stone, O1, of any approved formand material, around which an iron band is placed, which has upon itsperimeter a series of projections, c c a, for can rying the meal orflour to the discharge-aperture in the case which surrounds the stone;which case is to be made of wood or iron, and to be adjustable, ifdesired, it being so constructed as to inclose the running stoneentirely, and to be attached to a similar one which surrounds thestationary one, and thus form a tight case for both, so that no meal orflour can escape between them when the mill is running. This stone hasformed in its face, which is in a vertical position, a series of groovesor channels, in the usual or any approved form; and in consequence ofits arrangement upon the shaft C it is not permitted to have anylongitudinal movement, the outer end of said shaft being provided with asteel step, in or upon which it rotates, as shown in Fig. l of thedrawing. The stationary stone C2 is placed upon the Y as a veryimpertantfeature, as itY frequently Yhap- Y D1 D1, which have upon theirouter ends screwmovement of the pin or coekhead as will allow samehorizontal plane as is the revolving one, it being incased as abovedescribed, and provided with projections upon its outer surface or uponits inclosin g-case, which projections have formed in them grooves whichmove upon guide-ways formed upon or attached to the frame of the mill.These slots are to be so formed-either by having their inner surfacesrounded or in any other convenient mannerthat as the stationary ornon-revolving stone is moved toward the revolving one it may be made topresent its face thereto at any desired angle to its axis, so that thedistance between the faces of the two shall be the same over theirentire surfaces. rlhis is regarded pens that in putting up the mills theaxis of the revolving stone is not exactly in line with that ofthenon-revolving one, and if it should be the strain of the belt whichdrives it will in time wear the boxes to such an extent as to change thealignment, and thus make it necessary to change the position ofthestationary stone to correspond with that ofthe revolving one, which caneasily be done with our arrangement of devices, which we will newproceed to describe.

To effect the necessary adjustment of the stationary or non-revolvingstone a cross-bar, D, is attached to the frame by means of bolts orstuds threads for the reception of nuts, or of one nut anda hand-wheelwith a screw-thread formed in it. In the center' of the cross-bar thereis placed a stud or other point which bears upon or rests in a cavityformed in the stationary stone or its case in such a manner as to permitthe face of such stone to accommodate itself to the face of therunner-stone.

To facilitate the change of the position ofthe stone in a vertical linedrawn across its face, as well as in a horizontal line, the inner end ofthe pin or cock-head which passes through the crossbar is held in ametal collar, which rests upon a rubber or other spring which is placedbetween it and the cross-bar, such spring allowing such a the stationarystone to recede a short distance from the other should any hardsubstance get between the stones when in operation, and at the same timewill cause the stationary stone to assume its proper position withreference to the revolving one and insure the parallelism of theirfaces. This spring is compressed to such an extent by a nut on the endof the cock-head pin a-nd on the outside of the cross-bar as willprevent the stone from receding from the runner when grindthe nut, thecock-head pin can be made to yield s to a greater or lesser pressureofthe stone as may be required in grinding substances varying inhardness.

It will be observed that in passing between the stones the grain entersthrough an aperture formed'in the center of theY 5stationary one, at*Ywhich point it is first brought in contact with the one which isrevolving.

These mills are equally useful and applicable for grinding drugs,minerals, &c.

What we claim as our invention, and desire to secure by Letters Patent,is-

l. In combination with the stationary or nonrevolving stone of agrinding-mill, an oscillating cross-bar and cock-head, whereby the faceof such stone may be set and kept parallel with that of the revolvingone, substantially as and for the purpose set forth.

2. The combination and arrangement of the crossbar, the pin or cock-headwhich passes through its center, the spring` which surrounds and holdssaid pin, and the stationary stone of a grinding-mill, it beingsubstantially as and for the purpose set forth.

3. The cross-bar D, constructed with an aperture for the reception ofthe oscillating cock-head and with a socket for the spring.

4. rIhe arrangement herein shown of the shaft C, the vertical shaft B,and the shoe A4, the parts being constructed as and for the purpose setforth.

5. The cock-head pin, the spring which encircles it, the cross-head D,and the nut for regulatin g the stiffness of the spring7 in combinationwith the stationary or non-revolving stone of a grinding-mill, the partsbeing constructed and arranged substantially as 'and for the purpose setforth.

In testimony whereof wehave signed our nam es to this speciiication inthe presence of two subscribing witnesses.

ADDISON H. NORDYKE. DANIEL W. MARMON.

Witnesses JAMns SPnnn, CHARLES A. NORDYKE.

